Toshiba T1950 User Manual Download Page 133

Page: 133 / 184

4-26

Lift up the right side of the

lower system board

assembly and slide the assembly to

the right to release the

DC IN jack

on the left side of the board.

CAUTION:

When you remove the lower system board assembly, carefully

slide the FDD cable out of the hole on the middle frame assembly.

Figure 4-20 Removing the Lower System Board Assembly

Turn the lower system board assembly over, remove the

two M2.5x6 screws

, then

lift off the

lower metal plate

and PCMCIA

ejector button

(Figure 4-21).

Figure 4-21 Removing the Lower Metal Plate

Summary of Contents for T1950

Page 1: ...0MB T1950CT 200MB 320MB Optional Peripherals 101 key Keyboard PS 2 1 14 5mm PCMCIA Type III 2 0 Ports 1 9 PIN Serial 16450 UART 1 Parallel FDD BI DIR 1 15 PIN RGB 1 Mouse Quick Port DCBM 1 PS 2 Mouse Port not usable if DCBM connected Keyboard 1 101 key Keyboard Port PS 2 82 Keys 3mm Travel Battery NIMH 12V 2400mAH PART PA2420UXRA Battery Life 2 3 HRS Recharge Time 1 4 2 3 HRS Computer off only AC ...

Page 2: ...2 The T1950 Series Personal Computer is shown in Figure 1 1 and its system configuration is shown in Figure 1 2 Figure 1 1 T1950 Series Personal Computer Figure 1 2 T1950 Series System Unit Configuration ...

Page 3: ...1 3 1 2 System Unit Block Diagram Figure 1 3 is a block diagram of the T1950 Series system unit Figure 1 3 T1950 Series System Board Block Diagram ...

Page 4: ... and clock The remaining 114 bytes are used for the system configuration data OSC X3 generates 32 768 KHz for RTC A Keyboard Controller KBC One M37452M4 chip is used This KBC includes the keyboard scan controller and keyboard interface controller The KBC controls the internal keyboard external keyboard port PS 2 mouse port and Ball Point Quick Port The following memories Standard RAM 4 MB Cache me...

Page 5: ...ontroller SMI Controller VL Bus Controller Bus Controller Compatible Bus Interface Controller Compatible Access Controller DMAC Controller I O Controller Address Latch Controller 32 Bit to 16 Bit Controller Address Latch DMA Address Generator Refresh Address Generator I O Register Compatible I O Port Saving the data of the Register in resume Controller Toshiba Special Register 40 MHz 20 MHz Contro...

Page 6: ... specifications are listed in Table 1 1 Figure 1 4 3 5 inch FDD Table 1 1 3 5 inch FDD Specifications Item 2 MB mode 1 MB mode Storage capacity KB Unformatted 2 000 1 000 Formatted 1 311 737 Number of heads 2 2 Number of cylinders 80 80 Access time ms Track to track 3 3 Average 181 181 Head settling time 15 15 Recording track density tpi 135 135 Data transfer rate Kbps 500 250 Rotation speed rpm 3...

Page 7: ...able 1 2 2 5 inch HDD Specifications 120 MB 200 MB 320 MB CP2124 MK2124FC MK2224FC MK2326FC Storage capacity MB Formatted 121 6 130 1 213 0 340 0 Number of disks 2 2 2 3 Data heads 4 4 4 6 Data surfaces 4 4 4 6 Tracks per surface 1 123 1 155 1 560 1 830 Sectors per track 53 1 55 1 Bytes per sector 512 512 512 512 Access time ms Track to track 3 5 3 3 Average 16 17 12 12 Maximum 30 36 25 25 Rotatio...

Page 8: ... 82 USA or 84 European keyboard is mounted on the T1950 Series system unit and is connected to the keyboard controller on the system board through a 19 pin flat cable The keyboard is shown in Figure 1 6 Figure 1 6 Keyboard ...

Page 9: ...A The LCD receives vertical and horizontal synchronizing signals 8 bit data signals 4 bit upper block data signal and 4 bit lower block data signal and shift clock for data transmission All signals are CMOS level compatible The sidelit LCD is shown in Figure 1 7 and its specifications are listed in Table 1 3 Figure 1 7 Monochrome LCD Table 1 3 Monochrome LCD Specifications Item Specifications Numb...

Page 10: ...s the high frequency current needed to illuminate the FL The specifications for the FL inverter board are listed in Table 1 4 Table 1 4 Monochrome FL Inverter Board Specifications Item Specifications Input Voltage VDC 5 Power W 2 2 Voltage VAC 950 Output Current mA 4 2 Frequency KHz 38 5 ...

Page 11: ...0CS s LCD receives vertical and horizontal synchronizing signals 16 bit data signal 8 bit upper block data signal and 8 bit lower block data signal and shift clock for data transmission All signals are CMOS level compatible The STN LCD is shown in Figure 1 8 and specifications for the LCD are listed in Table 1 5 Figure 1 8 STN Color LCD Table 1 5 STN Color LCD Specifications Item Specifications Nu...

Page 12: ...s high frequency current to light the LCD s Fluorescent Lamp The specifications for the FL inverter are listed in Table 1 6 Table 1 6 STN Color FL Inverter Board Specifications Item Specifications Input Voltage VDC 5 Power W 6 Output Voltage VAC 1 000 Current mA 5 0 x 2 Frequency KHz 42 ...

Page 13: ... functions of Video Graphics Array VGA and Super VGA SVGA for external display The T1950CT s LCD receives 9 bit data signals data enable signals and shift clock for data transmission All signals are CMOS level compatible The TFT LCD is shown in Figure 1 9 and specifications are listed in Table 1 7 Figure 1 9 TFT Color LCD Table 1 7 TFT Color LCD Specifications Item Specifications Number of dots do...

Page 14: ...supplies high frequency current to light the LCD s Fluorescent Lamp The specifications for the FL inverter are listed in Table 1 8 Table 1 8 FL Inverter Board Specifications Item Specifications Input Voltage VDC 5 Power W 3 Output Voltage VAC 1 100 Current mA 5 0 Frequency KHz 47 ...

Page 15: ...peaker 4 Turns the battery charging system on and off and detects a fully charged battery 5 Determines if the power can be turned on and off 6 Provides more accurate detection of a low battery 7 Calculates the remaining battery capacity The power supply output rating is specified in Table 1 9 Table 1 9 Power Supply Output Rating DC Regulation Maximum Use for Name voltage tolerance current Ripple V...

Page 16: ... battery is fully charged AC adapter is attached No light The AC adapter is disconnected from the computer or the AC adapter is connected but it cannot charge the battery for one of the following reasons The battery is extremely hot Allow the computer and the battery to reach room temperature before attempting to charge the battery The battery is almost fully discharged The battery will not begin ...

Page 17: ...T1950CS T1950CT Trickle charge About 48 hours power on Quick Battery Charge If one of the following occurs the battery quick charge process stops 1 The battery becomes fully charged 2 The AC adapter or battery is removed 3 The battery or AC adapter output voltage is abnormal 4 The charge current is abnormal Trickle Battery Charge When the main battery is fully charged and the AC adapter is attache...

Page 18: ...charge 8 H 1 10 4 RTC Battery The RTC battery provides power to keep the current date time and other setup information in memory while the computer is turned off Table 1 13 shows the charging time and data preservation period of the RTC battery Table 1 13 RTC Battery Charging Data Preservation Time Time Charging Time Power On 48 H Power Off Doesn t charge Data preservation period full charge 1 mon...

Page 19: ...in Chapter 3 and detailed replacement procedures are given in Chapter 4 The following tools are necessary for implementing the troubleshooting procedures 1 T1900 T1900C Diagnostics Disk 2 Phillips head screwdriver 2 mm 3 Toshiba MS DOS system disk s 4 2DD or 2HD formatted work disk for floppy disk drive testing 5 Cleaning kit for floppy disk drive troubleshooting 6 Printer port LED 7 RS 232 C wrap...

Page 20: ...o enter the password If the user has forgotten the password connect the printer port wrap around board F31PRT then turn the POWER switch on The computer will override the password function by erasing the current password Verify with the customer that Toshiba MS DOS is installed on the hard disk Non Toshiba operating systems can cause the computer to malfunction Make sure all optional equipment is ...

Page 21: ...2 3 Figure 2 1 Troubleshooting Flowchart 1 2 ...

Page 22: ...ures as follows 1 If an error is detected on the System Test Memory Test Display Test ASYNC Test Printer Test or Real Timer Test perform the System Board Troubleshooting Procedures in Section 2 4 2 If an error is detected on the Keyboard Test perform the Keyboard Troubleshoot ing Procedures in Section 2 7 3 If an error is detected on the Floppy Disk Test perform the Floppy Disk Drive Troubleshooti...

Page 23: ...ator displays whether or not the AC adapter is connected and supplying power When the DC IN indicator is orange the AC adapter is connected and supplying power to the computer If the DC IN indicator does not light the AC adapter is not supplying power to the computer or is not attached to the computer go to Check 1 If the DC IN indicator is flashing orange the AC adapter s voltage supply is abnorm...

Page 24: ...he Battery LED indicator glows amber the AC adapter is connected and the battery is being charged If the Battery LED indicator does not glow go to Check 1 Check 1 Make sure the AC adapter s cable and AC cord are firmly plugged into the DC IN socket and wall outlet If these cables are connected correctly go to Check 2 Check 2 Make sure the battery pack is installed in the computer correctly If the ...

Page 25: ...eplaced Refer to Chapter 4 for instructions on how to disassemble the T1900 T1900C then perform the following check Check 1 Replace the lower system board with a new one and restart the system If the problem still exists go to Check 2 Check 2 Replace the upper system board with a new one and restart the system If the problem still exists other FRUs may be damaged ...

Page 26: ...is no error message go to Procedure 2 If Toshiba MS DOS is properly loaded go to Procedure 3 Check 1 If one of the following error messages is displayed on the screen press the F1 key as the message instructs a Error in CMOS Bad HDD type Check system Then press F1 key b Error in CMOS Bad battery Check system Then press F1 key c Error in CMOS Bad check sum Check system Then press F1 key d Error in ...

Page 27: ...etected during a read test of the Hard RAM or the data in Hard RAM is lost because the battery has become discharged If any other message appears perform Check 3 Check 3 The IRT checks the system boards When the IRT detects an error the system stops or an error message appears Refer to Table 2 1 for a list of error messages Table 2 1 IRT Error Messages 1 2 No Error Message 1 TIMER CH 2 OUT ERROR 2...

Page 28: ...6 RTC UPDATE ERROR If any of the following error messages is displayed go to Procedure 5 1 through 17 19 20 25 or 26 If Error Message 18 is displayed go to the Keyboard Troubleshooting Proce dures in Section 2 7 If Error Message 21 or 22 is displayed go to the HDD Troubleshooting Procedures in Section 2 6 If Error Message 23 or 24 is displayed go to the FDD Troubleshooting Procedures in Section 2 ...

Page 29: ...ter port LED into the computer s PRT FDD connector 4 Hold down the space bar and turn on the T1900 T1900C s power 5 Read the LED status from left to right as you are facing the back of the computer 6 Convert the status from binary to hexadecimal notation 7 If the final LED status is FFh normal status go to Procedure 3 8 If the final LED status matches any of the test status values in Table 2 2 go ...

Page 30: ...check sum Error in CMOS Bad configuration Error in CMOS Bad memory size Error in CMOS Bad HDD type Error in CMOS Bad time function Check system Then press F1 key 18H PIC initialization 1FH Display initialization CRTC ERROR VRAM ERROR READ DATA XXXXXXXXH WRITE DATA XXXXXXXXH 22H KBC test KBC ERROR 25H System memory test SYSTEM MEMORY ERROR ADDRESS XXXXXXXXH READ DATA XXXXXXXXH WRITE DATA XXXXXXXXH ...

Page 31: ...nitialization NO FDD ERROR FDD ERROR 70H Printer test 80H RS 232 C test 90H Timer initialization TIMER INTERRUPT ERROR RTC UPDATE ERROR A0H NDP initialization A6H Expansion I O ROM FFH Expansion system ROM Check 1 If any of the following error codes are displayed go to Procedure 5 01h 05h 06h 07h 0Ah 0Bh 0Dh 15h 16h 18h 1Fh 22h 25h 30h 40h 41h 42h 54h 55h 65h 70h 80h 90h A0h A6h Check 2 If Error C...

Page 32: ... hexadecimal notation 7 If the final LED status is FFh normal status go to Procedure 4 8 If the final LED status matches any of the test status values listed in Table 2 3 go to Procedure 5 Table 2 3 Printer Port LED Resume Mode Error Status Error Status Meaning of Status 00H RAM BIOS error F0H Press the reset switch F1H Suspend process error The system will suspend while FDD is accessed etc F2H Th...

Page 33: ... the tables in Appendix B If the error is related to an IC or connector listed in Table B 1 or B 2 replace the FATSU upper system board first If the error is related to an IC or connector listed in Table B 3 or B 4 replace the FATSL lower system board first As an example if the error status indicates a keyboard KBC problem replace the FATSU since the keyboard controller IC15 is located on the uppe...

Page 34: ...MS DOS run the Diagnostics Program then clean the FDD heads using the cleaning kit If the FDD still does not function properly after cleaning go to Procedure 3 If the test program cannot be executed on the T1900 T1900C go to Procedure 2 Procedure 2 External 5 25 inch FDD Check The floppy disk controller on the computer s lower system board controls the internal and the external FDD To determine if...

Page 35: ...d in Table 2 4 Table 2 4 Floppy Disk Drive Error Codes and Statuses Code Status 01h Bad command 02h Address mark not found 03h Write protected 04h Record not found 06h Media removed on dual attach card 08h DMA overrun error 09h DMA boundary error 10h CRC error 20h FDC error 40h Seek error 60h FDD not drive 80h Time out error Not ready EEh Write buffer error FFh Data compare error If any errors oth...

Page 36: ...ng checks Check 1 Make sure the FDD cable is firmly connected to the lower system board FDD PJ202 Lower System Board If this cable is disconnected connect it to the system board and repeat Procedure 3 If the FDD is still not functioning properly perform Check 2 Check 2 The FDD or its cable may be defective or damaged Replace the FDD with a new one following the steps in Chapter 4 If the FDD is sti...

Page 37: ...disk and turn on the computer then perform the following checks Check 1 Type C and press Enter If you cannot change to Drive C go to Check 2 If you can change to Drive C go to Procedure 2 Check 2 Type FDISK and press Enter Choose Display Partition Information from the FDISK menu If Drive C is listed go to Check 3 If Drive C is not listed return to the FDISK menu and choose the option to create a D...

Page 38: ...system disk in drive Press any key when ready or Non System disk or disk error Replace and press any key Check 3 Using the Toshiba MS DOS system disk install a system program on the hard disk usingtheSYScommand If the following message appears on the display the system program has been transferred to the HDD Restart the T1900 T1900C If the error message still appears perform Check 4 System transfe...

Page 39: ...age appears on the display the HDD is formatted Format complete If any other error message appears on the display refer to the Toshiba MS DOS Manual for more information and perform Check 2 Check 2 Using the T1900 T1900C Diagnostic Disk format the HDD with a low level format option Refer to Chapter 3 Test and Diagnostics for more information about the diagnostic program If the following message ap...

Page 40: ...perly Table 2 5 Hard Disk Drive Error Codes and Statuses Code Status 01h Bad command 02h Bad address mark 04h Record not found 05h HDC not reset 07h Drive not initialized 08h HDC overrun DRQ 09h DMA boundary error 0Ah Bad sector error 0Bh Bad track error 10h ECC error 11h ECC recover enable 20h HDC error 40h Seek error 80h Time out error AAh Drive not ready BBh Undefined error CCh Write fault E0h ...

Page 41: ...Procedure 2 Connector and Replacement Check The keyboard is connected to the upper system board by a 19 pin flat cable This cable may be disconnected or damaged Disassemble the T1900 T1900C as described in Chapter 4 Replacement Procedures and perform the following checks Check 1 Make sure the keyboard cable is not damaged and is connected to the system board Keyboard Cable PJ4 Upper System Board I...

Page 42: ...ocedure 2 External CRT Check Connect the external CRT to the T1900 T1900C s external monitor port then boot the computer The computer automatically detects the external CRT even if Resume mode is enabled If the external CRT works correctly the internal LCD display may be damaged Go to Procedure 4 If the external CRT appears to have the same problem as the internal LCD the display controller may be...

Page 43: ...two signal cables as shown below Any of these cables may be disconnected Disassemble the display unit and check the following cable connections Refer to Chapter 4 for more information about how to disassemble the computer Figure 2 3 T1900 Display Connections Figure 2 4 T1900C Display Connections If any of these cables are not connected firmly reconnect them and repeat Procedures 1 and 2 If the pro...

Page 44: ... 4 Check 1 Replace the FL with a new one and test the display again If the problem still exists perform Check 2 Check 2 Replace the FL inverter board with a new one and test the display again If the problem still exists perform Check 3 Check 3 Replace the LCD module with a new one and test the display again If the problem still exists perform Check 4 Check 4 Replace the display switch with a new o...

Page 45: ...lowing eight functions DIAGNOSTICTEST HARDDISKFORMAT HEADCLEANING LOGUTILITIES RUNNINGTEST FDDUTILITIES SYSTEMCONFIGURATION SETUP The DIAGNOSTIC TEST option contains the following ten functional tests SYSTEMTEST MEMORYTEST KEYBOARDTEST DISPLAYTEST FLOPPYDISKTEST PRINTERTEST ASYNCTEST HARDDISKTEST REALTIMERTEST PCMCIATEST The following equipment is needed to perform some of the T1900 T1900C Diagnos...

Page 46: ...ector for the printer wraparound test Printer test An RS 232 C wraparound connector for the RS 232 C port wraparound test ASYNCtest The following sections detail the tests within the Diagnostic Test function of the DIAGNOS TIC TEST option menu Refer to Sections 3 16 through 3 22 for detailed information on the remaining seven Service Program Module functions ...

Page 47: ...e TESTCE19 and press Enter The following menu will appear TOSHIBA personal computer T1900 DIAGNOSTICS version X XX c copyright TOSHIBA Corp 19XX DIAGNOSTICS MENU 1 DIAGNOSTIC TEST 2 HARD DISK FORMAT 3 4 HEAD CLEANING 5 LOG UTILITIES 6 RUNNING TEST 7 FDD UTILITIES 8 SYSTEM CONFIGURATION 9 EXIT TO MS DOS 0 SETUP Select items Enter Specify Esc Exit NOTE To exit the T1900 T1900C DIAGNOSTIC TEST menu p...

Page 48: ... 13 for detailed descriptions of Diagnostic Tests 1 through 10 Function 88 sets the floppy disk drive and hard disk drive error retry count Function 99 exits the submenus of the Diagnostic Test and returns to the DiagnosticMenu 5 Select the option you want to execute and press Enter The following message appears SYSTEM TEST XXXXXXX T1900 DIAGNOSTIC TEST VX XX Ctrl Break test end Ctrl C key stop SU...

Page 49: ...is found and displays the operation guide on the right side of the display screen as shown below ERROR STATUS NAME HALT OPERATION 1 Test end 2 Continue 3 Retry These three selections have the following functions 1 Terminates the test program and exits to the subtest menu 2 Continuesthetest 3 Restarts the test from the error Use the arrow keys to move the cursor to the desired option and press Ente...

Page 50: ...y 3 KEYBOARD 01 Pressed key display 82 84 02 Pressed key code display 03 PS 2 Mouse connect check 04 DCBP connect check 4 DISPLAY 01 VRAM read write 02 Character attributes 03 Character set 04 80 25 30 Character display 05 320 200 Graphics display 06 640 200 Graphics display 07 640 350 400 480 Graphics display 08 Display page 09 H pattern display Border color 10 LED DAC pallet 11 64 color display ...

Page 51: ...Card modem loopback 2400BPS 06 Interrupt test 8 HDD 01 Sequential read 02 Address uniqueness 03 Random address data 04 Cross talk peak shift 05 Write read compare CE 06 Write specified address 07 Read specified address 08 ECC circuit 09 Sequential write 10 W R C specified address 9 REAL TIMER 01 Real time 02 Backup memory 03 Real time carry 10 PCMCIA 01 I O card test ...

Page 52: ... test reads and displays the hardware status as shown below 76543210 H W status 10001000 Bit7 Bit6 CPU clock 20MHz Bit5 Notch signal 2HD Bit4 FDD type 2MB Bit3 Bit2 Drive A B Ext B Bit1 External FDD OFF Bit0 Internal FDD 2HD Table 3 2 describes the hardware bit status for each bit tested Pressing Enter returnsyoutothesubtestmenu Table 3 2 Hardware Bit Status Bit H W Status 1 0 7 Reserved 6 CPU clo...

Page 53: ...rence data stored in the test pro gram When the read information is lower than the reference data the test program displays the following screen image To exit this screen press the S key When the read information is higher the display is unchanged ROM BIOS V1 00 OK V1 10 ROM BOOT V1 00 OK V1 00 KBC Version V1 26 NG V1 00 PS Micom Version V1 35 OK V1 35 Reference data Current data ...

Page 54: ...onal memory program end to 640 KB then reads the new data and compares the results with the original data Subtest03 RAM refresh real mode This subtest writes a 256 byte unit of constant data to conventional memory 0 to 640 KB then reads the new data and compares the results with the original data The constant data is AAAAh and 5555h NOTE There is a short delay between write and read operations dep...

Page 55: ...address C8000h to CFFFFh then reads new data and compares the results with the original data The constant data is 0000h 5555h AAAAh and FFFFh Subtest07 Hard RAM This subtest writes a word unit of constant data to memory address E0000h to E7FFFh then reads the new data and compares the results with the original data The constant data is 0000h 5555h AAAAh and FFFFh This subtest also executes the pag...

Page 56: ...and press Enter Subtest01 Pressed key display 82 84 NOTE The Num Lock and the Overlay modes must be off to execute this subtest When you execute this subtest the keyboard layout is drawn on the display as shown below When any key is pressed the corresponding key on the screen changes to an character Holding a key down enables the auto repeat function which causes the key s display character to bli...

Page 57: ...n in Appendix E KEYBOARD TEST IN PROGRESS 302000 Scan code Character code Keytop Ins Lock Caps Lock Num Lock Scroll Lock Alt Ctrl Left Shift Right Shift PRESS Enter KEY Subtest03 PS 2 mouse connect check NOTE To execute the PS 2 mouse connect check a PS 2 mouse must be connected to the computer This subtest checks whether a PS 2 mouse is connected or not If this test does not detect an error it re...

Page 58: ...must be connected to the computer This subtest checks whether a ball point mouse is connected or not If this test does not detect an error it returns to the subtest menu If it detects an error the following message appears KBD DCBP INTERFACE ERROR HALT OPERATION 1 Test end 2 Continue 3 Retry ...

Page 59: ... displays the following character attribute modes normal intensi fied reverse and blinking as shown in the display below The character attribute modes display the foreground color and intensified color 16 colors or 16 level gray scale using black blue red magenta green cyan yellow and white from the color display The display below appears on the screen when this subtest is executed CHARACTER ATTRI...

Page 60: ...nu press Ctrl Break Subtest03 Character Set In this subtest the character set addressed 00h to FFh is displayed in the 40 25 character mode as shown below Press Enter KEY To exit this subtest and return to the DISPLAY TEST menu press Ctrl Break 320 200 GRAPHICS DISPLAY 13 PRESS ENTER KEY BLACK BLUE GREEN CYAN RED MAGENTA BROWN WHITE GRAY LIGHT BLUE LIGHT GREEN LIGHT CYAN LIGHT RED LIGHT MAGENTA YE...

Page 61: ... 0123456789 ABCDEFGHIJKLMNOPQRSTUVWXYZ _ abcdefghijklmnopqrstuvwx 0123456789 ABCDEFGHIJKLMNOPQRSTUVWXYZ _ abcdefghijklmnopqrstuvwxy 0123456789 ABCDEFGHIJKLMNOPQRSTUVWXYZ _ abcdefghijklmnopqrstuvwxyz 0123456789 ABCDEFGHIJKLMNOPQRSTUVWXYZ _ abcdefghijklmnopqrstuvwxyz 0123456789 ABCDEFGHIJKLMNOPQRSTUVWXYZ _ abcdefghijklmnopqrstuvwxyz 0123456789 ABCDEFGHIJKLMNOPQRSTUVWXYZ _ abcdefghijklmnopqrstuvwxyz ...

Page 62: ...ter Display mode 10 74 12 This subtest displays even dots odd dots and all dots in the 640x350 640x400 and 640x480 dot graphics mode 10 74 12 as shown below Pressing Enter changes the size of the displayed image To exit this subtest and return to the DISPLAY TEST menu press Ctrl Break 640 200 GRAPHICS DISPLAY X EVEN DOTS ODD DOTS ALL DOTS DRIVEN DRIVEN DRIVEN PRESS Enter KEY 640 XXX GRAPHICS DISPL...

Page 63: ... HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH...

Page 64: ...cessor latch test Processor latch test 1 256 times 2 endless After pressing Enter the subtest writes the 2A and 15 data to 6 bits of 256x3 RGB then reads new data and compares the results with the original data To exit press Ctrl Break then press Enter Subtest11 64 color display This subtest displays seven screens The first shows many colors at once the next three display 64 shades of red green an...

Page 65: ...loppy disk in the test drive to be tested and press Enter Media in drive X mode 0 2DD 1 2D 2 2D 2HD 2DD 3 2HD 3 Select the track you want the test to start on and press Enter Simply pressing Enter sets the start track to zero Test start track Enter 0 dd 00 79 4 The floppy disk test menu will appear after you select the start track number Select the number of the subtest you want to execute and pre...

Page 66: ... Test Menu Refer to Step 3 at the beginning of this section to set the start track Subtest02 Sequential Read Write This subtest continuously writes data pattern B5ADADh to all the specified tracks selected in Subtest 01 The data is then read and compared to the original data Subtest03 Random Address Data This subtest writes random data to random addresses on all tracks defined in Subtest 01 The da...

Page 67: ...and press Enter to execute the selected subtest Subtest01 Ripple Pattern This subtest prints characters for codes 20h through 7Eh line by line while shifting one character to the left at the beginning of each new line 0123456789 ABCDEFGHIJKLMNOPQRSTUVWXYZ _ abcdefghijklmno 0123456789 ABCDEFGHIJKLMNOPQRSTUVWXYZ _ abcdefghijklmnop 0123456789 ABCDEFGHIJKLMNOPQRSTUVWXYZ _ abcdefghijklmnopq 0123456789 ...

Page 68: ... THIS LINE SHOWS COMPRESSED PRINT 4 THIS LINE SHOWS EMPHASIZED PRINT 5 THIS LINE SHOWS DOUBLE STRIKE PRINT 6 ALL CHARACTERS PRINT 0123456789 ABCDEFGHIJKLMNOPQRSTUVWXYZ _ abcdefghijklmn opqrstuvwxyz Subtest03 Wraparound NOTE To execute this subtest a printer wraparound connector must be connected to the computer s printer port The printer wraparound connector 34M741986G01 wiring diagram is describe...

Page 69: ... 1 XXXXh Channel 2 XXXXh Channel 3 XXXXh Select the Channel number 1 3 The serial I O port address is specified by the XXXXh number Select the serial port channel number and press Enter to start the subtest Subtest01 Wraparound board NOTE To execute this subtest an RS 232 C wraparound connector 34M741621G01 must be connected to the RS 232 C port The RS 232 C wraparound connector wiring diagram is ...

Page 70: ...xecute this subtest a 2400 bps card modem must be installed 2 It is not necessary to turn on power to the modem at the Setup option When you select this subtest the modem is powered on automatically 3 To execute this subtest set the PCMCIA Slot to Others in the Setup program This subtest sends data from the RS 232 C port to the built in modem The same data is then sent from the modem to the RS 232...

Page 71: ... test from the DIAGNOSTIC TEST MENU Answer each of the following questions with an appropriate response to execute thetest 1 When you select the hard disk test from the DIAGNOSTIC TEST menu the follow ing message will appear Test drive number select 1 HDD 1 2 HDD 2 0 HDD1 2 2 Select the hard disk drive number to be tested and press Enter The following message will appear HDC F W error retry 1 yes ...

Page 72: ...ts indicate the error status code as explained in Table 3 3 in Section 3 14 Subtest01 Sequential Read This subtest is a sequential reading of all the tracks on the HDD starting at Track 0 When all the tracks on the HDD have been read the test starts at the maximum track and reads the tracks on the HDD sequentially back to Track 0 Subtest02 Address Uniqueness This subtest writes unique address data...

Page 73: ...E cylinder and compares it with the origi nal data Subtest06 Write specified address This subtest writes specified data to a specified cylinder and head on the HDD Subtest07 Read specified address This subtest reads data which has been written to a specified cylinder and head ontheHDD Subtest08 ECC circuit This subtest checks the Error Check and Correction ECC circuit functions of the specified cy...

Page 74: ...e XX XX XX Enter new date PRESS ENTER KEY TO EXIT TEST 2 If the current date is not correct input the correct date at the Enter new date prompt and press Enter The following prompt will appear Enter new time 3 If the current time is not correct input the correct time in 24 hour format Pressing Enter toggles between the time and the date To exit press Ctrl Break Subtest02 BackupMemory This subtest ...

Page 75: ... This subtest checks the real time clock increments making sure the date and time are displayed in the following format Current date 12 31 1992 Current time 23 59 58 After two seconds the following displays Current date 01 01 1993 Current time 00 00 00 PRESS Enter KEY TO EXIT TEST Press Ctrl Break to exit ...

Page 76: ...t Address line REG CE 1 CE 2 line Data line Speaker line Wait line BSY BVD1 line This subtest is executed in the following order Sub Address Good Bad Contents 01 00001 nn xx Address line 00001 nn xx REG CE 1 CE 2 nn A0 90 80 00 02 00002 ww rr Data line ww write data rr read data 03 00003 Speaker line 04 00004 40 80 xx Wait line 40 xx 80 05 00005 nn xx Other lines BSY BVD1 nn 21 00 ...

Page 77: ...ed Mode Not Changed 14 Memory Read Write Error 1B H RAM Mapping Error 1C H RAM Read Write Error DD Cache Memory Error KEYBOARD 03 Mouse Interface Error 04 DCBP Interface Error FDD 01 Bad Command 02 Address Mark Not Found 03 Write Protected 04 Record Not Found 06 Media Removed 08 DMA Overrun Error 09 DMA Boundary Error 10 CRC Error 20 FDC Error 40 Seek Error 60 FDD Not Drive Error 80 Time out Error...

Page 78: ... Modem HDD 01 Bad Command Error 02 Bad Address Mark Error 04 Record Not Found 05 HDC Not Reset Error 07 Drive Not Initialized 08 HDC Overrun DRQ 09 DMA Boundary Error 0A Bad Sector 0B Bad Track Error 10 ECC Error 11 ECC Recover Enable 20 HDC Error 40 Seek Error 80 Time out Error AA Drive Not Ready BB Undefined Error CC Write Fault E0 Status Error EE Access Time out Error PCMCIA C1 Address Line Err...

Page 79: ...DC status register and error register are described in Tables 3 4 and 3 5 Table 3 4 Hard Disk Controller Status Register Contents Bit Name Description 7 BSY 0 HDC is busy Busy 1 HDC is ready 6 DRDY 0 Hard disk drive is not ready to accept any command Drive ready 1 Hard disk drive is ready 5 DWF 0 DWF error is not detected Drive write fault 1 Write fault condition occurred 4 DSC 0 The hard disk dri...

Page 80: ...le 1 Uncorrectable data error has been detected 5 Not used 4 IDNF 0 Other Identification 1 There was no ID field in the requested sector 3 Not used 2 ABRT 0 Other Abort 1 Illegal command error or a drive status error occurred 1 TK00 0 The hard disk found Track 0 during a recalibrate command Track 0 1 The hard disk could not find Track 0 during a recalibrate command 0 Not used ...

Page 81: ...ne with the Toshiba MS DOS BACKUP command See the Toshiba MS DOS manual for details 3 16 1 Function Description 1 All track FORMAT This option performs a low level format of all the tracks on the hard disk as shown in Table 3 6 below NOTE Before executing the All Track FORMAT option check for bad tracks using the Bad Track CHECK option or display a list of bad tracks on the HDD Table 3 6 Hard Disk...

Page 82: ... displayed when the program is complete If an error other than a bad track is detected the program is auto matically terminated 3 16 2 Operations CAUTION The contents of the hard disk will be erased when this program is ex ecuted Before executing the function transfer the contents of the hard disk onto a floppy disk s This can be done with the Toshiba MS DOS BACKUP command See the Toshiba MS DOS m...

Page 83: ...r JVC HDDs which are the only disks with unlock formats you must select 2 yes If 1 is selected with a JVC disk an error will be gener ated The system defaults to 1 and this message does not appear when other disks are installed 4 Bad track register Next the Bad Track register prompt will appear as shown below Enter the cylinder and head numbers of bad tracks and press Enter Note that if there are ...

Page 84: ...bad track you can use this sub test to reformat the track as a good track To format a track as a good track enter the number for the drive interleave cylinder and head as indicated in the screen prompt shown below Drive number select 1 1 2 2 Interleave number 1 1 8 Press Cylinder number dddd Press Head number dd Press Enter to return to the Hard Disk Format menu 3 Bad track FORMAT To format a trac...

Page 85: ...prompt shown below Drive number select 1 1 2 2 Bad tracks will be displayed in the format shown below cylinder head 0123 03 Press Enter to return to the Hard Disk Format menu NOTE After the HDD has been formatted execute the Toshiba MS DOS FDISK command to partition the HDD Next execute the Toshiba MS DOS FORMAT com mand Refer to the Toshiba MS DOS manual for more information about using these com...

Page 86: ...Head Cleaning from the DIAGNOSTIC MENU and press Enter to display the following messages DIAGNOSTICS FLOPPY DISK HEAD CLEANING VX XX Mount cleaning disk s on drive s Press any key when ready 2 Remove the Diagnostics Disk from the FDD insert the cleaning disk and press Enter 3 When the cleaning start message appears the FDD head cleaning has begun 4 The display automatically returns to the DIAGNOST...

Page 87: ...FDD HDD or memory address ADDR 7 Write data WD 8 Read data RD 9 HDCstatus HSTS 10 Error status name ERROR STATUS NAME 3 18 2 Operations 1 Select 5 Log Utilities from the DIAGNOSTIC MENU and press Enter Error information is logged into RAM or onto a floppy disk This information is displayed in the following format XXXXX ERRORS CNT TS NAME PASS STS ADDR WD RD HSTS STATUS NAME 001 FDD 02 0000 103 000...

Page 88: ...page The 3 key returns to the Diagnostic Menu The 4 key erases all error log information in RAM The 5 key outputs the error log information to a printer The 6 key reads the log information from a floppy disk The 7 key writes the log information to a floppy disk 3 In the case of error retry OK a capital R is placed at the beginning of the error status However it is not added to the error count ...

Page 89: ...is not loaded an error will be generated during the FDD testing 1 Remove the diagnostics disk from the floppy disk drive and insert the work disk 2 Select 6 Running Test from the Diagnostic Menu and press Enter The following message will be displayed Printer wraparound test Y N Selecting Y yes executes the printer wraparound test Note that a printer wraparound connector must be connected to the PR...

Page 90: ...ess Enter The following message appears Mount the work disk s on the drive s then press Enter key Warning The contents of the disk s will be destroyed 5 This program is executed continuously To terminate the program press Ctrl Break ...

Page 91: ...I MFM mode 512 bytes 9 sectors track 2 2DD Double sided double density double track 96 135 TPI MFM mode 512 bytes 9 sectors track 3 2HD Double sided high density double track 96 135 TPI MFM mode 512 bytes 18 sectors track 2 COPY This program copies data from a source floppy disk to a target floppy disk 3 DUMP This program displays the contents of the floppy disk both 3 5 inch and 5 25 inch and the...

Page 92: ...e work disk and press any key The following message will be displayed when the FDD format is ex ecuted FDD TYPE TRACK XXX FDD TYPE HEAD X FDD TYPE SECTOR XX Format start track head XXX X After the floppy disk is formatted the following message appears Format complete Another format 1 Yes 2 No 5 Typing 1 displays the message from Step 3 above typing 2 returns the display screen to the DIAGNOSTIC ME...

Page 93: ...e floppy disk has been copied the following message will ap pear Copy complete Another copy 1 Yes 2 No 5 To copy another disk type 1 and the message from Step 1 will be dis played again Entering 2 returns the test program to the DIAGNOSTIC MENU 4 DUMPprogram 1 When DUMP is selected the following message appears DIAGNOSTICS HARD DISK FLOPPY DISK DUMP VX XX Drive type select 1 FDD 2 HDD 2 Select a f...

Page 94: ...nsert a source disk and press any key The following message appears Max address Track 0079 Head 01 Sector 09 Track number 6 Set the track number you want to dump The system will access the disk and dump a list ...

Page 95: ...umber of hard disk drives 8 The number of printer ports 9 ExtendedMemorySize 10 PS Micom Version 3 21 2 Operations Select 8 System Configuration from the DIAGNOSTIC MENU and press Enter The follow ing system configuration displays SYSTEM CONFIGURATION BIOS ROM VERSION VX XX BOOT ROM VERSION VX XX KBC VERSION VX XX 639KB MEMORY 1 FLOPPY DISK DRIVE S 1 ASYNC ADAPTER 1 HARD DISK DRIVE S 1 PRINTER ADA...

Page 96: ... BIOS ROM 2 Display 1 Display Adapter 2 LCD Display Mode 3 LCD Gray Scale Level 3 COM PCMCIA FDD PRT 1 Serial Port 2 PC Card Slot 3 ExternalFDD PRT 4 Printer Port Type 4 Hard Disk 5 Power on Password 6 Others 1 Power up Mode 2 CPUCache 3 Processing Speed 4 Battery Save Mode 5 Popup 6 Speaker 7 Battery Alarm 7 Battery Save Options 1 CPU Sleep Mode 2 HDDAutoOff 3 Display Auto Off ...

Page 97: ...plays Are you sure Y N a To make other changes press N then repeat the steps above b To accept the changes press Y The system will reboot automatically NOTE You can press Esc to quit at any time without saving changes SETUP will ask you to confirm that you do not want to save your changes Not Registered BIOS version x xx T1900 SETUP Capacity MB POWER ON PASSWORD HARD DISK Power up Mode Boot CPU Ca...

Page 98: ... cally calculated by the computer This value cannot be changed 2 Base This field displays the amount of base conventional memory 640 KB and is automatically calculated by the computer This value cannot be changed 3 ExtendedMemory This field displays the amount of extended memory the computer has available This value is calculated automatically when modifications are made to the Hard Ram value 4 Ha...

Page 99: ...is is also used whenyouattachaVGAmonochromemonitorto the external display port Note that some software is displayed best in monochrome mode NOTE When you connect a CRT to the computer you cannot change the display mode The LCD Display Mode is automatically set to conform to the CRT being used 3 LCD Gray Scale Level T1900 only This option which appears in SETUP and in the Pop up Window lets you swi...

Page 100: ...the card modem s COM level is automatically reset to Not Used 2 PC Card Slot This option enables you to select how the PC Card slot is used PCMCIA Identifies an installed PCMCIA card Default Others Identifies an installed Toshiba card modem model PC 22 T24M or PC T24SL When you choose Others the sub window below appears allowing you to control the modem s COM Port and power COM Port COM2 IRQ3 2F8H...

Page 101: ...None A FDD A A B FDD B B A 4 Printer Port Type This option sets the communication mode for the printer FDD port to either output only or bi directional and is effective only when the Exter nal FDD PRT option is set to Printer If FDD A or B is selected for the External FDD PRT option this setting is ignored and the mode is auto matically set to bi directional For most printers the port should be se...

Page 102: ...stered displays press the space bar or BkSp key The following prompt appears Password b Enter a password of up to 10 characters The character string you enter is displayed as a string of asterisks For example if you enter a password consisting of four characters the display is shown as Password NOTE If you press Enter before entering the password Not Registered reappears on the display c Press Ent...

Page 103: ...password and press Enter The character string you enter is displayed as a string of asterisks Password c If the character string you enter matches the registered password the password option is reset and the display change to Not Registered If they do not match the following message appears along with a beep indicating you must repeat Step b Entry Error 3 Making a Password Service Disk You must ge...

Page 104: ... with these options depends primarily on the kind of software or peripherals you use 1 Power up Mode This option let you choose between AutoResume and boot mode You can also set this option using the Pop up Window Boot Turns on boot mode Default Resume TurnsontheAutoResumefeature NOTE AutoResume does not work with the enhanced mode of Microsoft Windows unless the WRESUME driver is loaded See Chapt...

Page 105: ...nnected BATTERYSAVEOPTIONS CPU Sleep Mode Enabled HDDAutoOff 03 Min Display Auto Off 03 Min Automatic Default when the computer is booted with the AC Normal life adapterconnected BATTERYSAVEOPTIONS CPU Sleep Mode Disabled HDDAutoOff Disabled Display Auto Off Disabled User Setting This option allows you to set the battery save parameters on the BATTERY SAVE OPTIONSsub window When this option is sel...

Page 106: ... alarms are unaffected This option also appears in the Pop up Window Enabled Enables software use of the system speaker Default Disabled Disables software use of the system speaker 7 Battery Alarm This option enables and disables the low battery alarm The option also appears in the Pop up Window Enabled Enables the alarm Default Disabled Disables the alarm 7 Battery Save Options 1 CPU Sleep Mode T...

Page 107: ...play automatic power off function This function causes the computer to turn the side light off if you make no entry for the set period of time Disabled Disables display automatic power off xx Min Automatically turns off power to the sidelit LCD panel if it is not used for the duration set The duration xx can be set to 1 3 5 10 15 20 or 30 minutes Always OFF Turns off the power to the display s flu...

Page 108: ...y T1900 Color LCD Display T1900C Upper System Board Lower System Board Before You Begin Look over the procedures in this section before you begin disassembling the T1900 T1900C Familiarize yourself with the disassembly and reassembly steps then begin each procedure by removing the AC adapter and the battery pack as instructed in Section 4 2 The Battery Pack 1 Do not disassemble the T1900 T1900C un...

Page 109: ...the appropriate test on the FRU you have fixed or replaced NOTE The illustrations in Chapter 4 are based on the appearance of the T1900C unless otherwise noted Disassembly Procedures The T1900 T1900C has two basic types of cable connectors Pressure Plate Connectors Normal Pin Connectors To disconnect a pressure plate connector lift up the tabs on either side of the connector s plastic pressure pla...

Page 110: ...ds or the head of the screw and may prevent proper seating of anFRU After installing an FRU confirm that it and the computer are functioning properly Tools and Equipment The use of ElectroStatic Discharge ESD equipment is very important for your safety and the safety of those around you Proper use of these devices will increase the success rate of your repairs and lower the cost for damaged or des...

Page 111: ...mputer and press the release button until it clicks The battery will pop out slightly Figure 4 1 3 Firmly grasp the battery pack and pull it out Figure 4 1 Removing the Battery Pack Installing the Battery Pack NOTE The battery pack is designed to fit into the T1900 T1900C in only one way To install the battery pack follow the steps below and refer to Figure 4 1 1 Gently slide the battery pack into...

Page 112: ...all external cables connected to the computer 2 Remove the battery pack as described in Section 4 2 3 Open the cover to the expansion memory slot 4 Grasp the plastic tab and pull it so the card comes partially out of the computer 5 Grasp the optional memory card and pull it completely out Figure 4 2 Removing the Optional Memory Card CAUTION DO NOT touch the connecting edge of the memory card Debri...

Page 113: ...h the word insert and an arrow pointing toward the connecting edge Turn the memory card so that it is facing up and carefully insert the connecting edge arrow first into the slot Push gently to ensure a firm connection 2 Close the expansion memory cover 3 Install the battery pack as described in Section 4 2 4 The T1900 T1900C automatically configures all additional memory as extended memory ...

Page 114: ...apter power cord and all external cables connected to the computer 2 Remove the battery pack as described in Section 4 2 3 Open the PCMCIA card slot cover located below the memory card slot then slide the PCMCIA card sliding stopper to the left 4 Use a coin or similar object to slide the PCMCIA card release button on the bottom of the computer to pop the card slightly out 5 Grasp the card and pull...

Page 115: ...re the card is right side up and the contact surface is inserted first 2 When the card is almost fully seated you will feel some resistance Press gently to assure a firm connection but do not force the card into position 3 Push the PCMCIA card sliding stopper into place then close the PCMCIA slot cover Figure 4 4 Installing the Optional PCMCIA Card 4 Install the battery pack as described in Sectio...

Page 116: ...external cables connected to the computer 2 Remove the battery pack optional memory card and optional PCMCIA card as described in Sections 4 2 4 3 and 4 4 3 At the back of the computer remove the four M2 5x6 silver screws securing the top cover Figure 4 5 Figure 4 5 Removing Top Cover Screws 4 Turn the computer so the front faces you and open the display Lay the display back fully Put a book or sm...

Page 117: ...t by pressing on the front of the top cover just in front of the space bar and rotate the keyboard s front edge toward you to release the front latches Figure 4 6 8 Continue around the rim until all latches are released then carefully lift up the top cover Figure 4 6 NOTES 1 The latch on the back left corner may catch To release this latch gently jiggle the cover back and forth to free it from the...

Page 118: ...ace Continue along the sides and snap the front latches last Figure 4 6 3 Secure the M2 5x10 screw above the keyboard and replace the screw cover Figure 4 6 4 Close the display and set the RGB and PRT port protective covers in place 5 Secure the four M2 5x6 silver screws at the back of the unit Figure 4 5 6 Install the optional PCMCIA card optional memory card and battery pack as described in Sect...

Page 119: ...ter power cord and all external cables connected to the computer 2 Remove the battery pack optional memory card optional PCMCIA card and top cover as described in Sections 4 2 through 4 5 3 Carefully lift up the keyboard to expose the keyboard connector 4 Disconnect the keyboard cable from pressure plate connector PJ4 on the upper system board and set the keyboard aside Figure 4 7 Removing the Key...

Page 120: ...ector PJ4 on the upper system board Figure 4 7 2 Seat the keyboard in the computer Note that a fold is built into the keyboard cable Do not try to bend the cable at any other point when you install the keyboard Figure 4 8 Figure 4 8 Seating the Keyboard 3 Install the top cover optional PCMCIA card optional memory card and battery pack as described in Sections 4 5 through 4 2 ...

Page 121: ... optional memory card optional PCMCIA card top cover and keyboard as described in Sections 4 2 through 4 6 3 Remove the tape next to the keyboard connector PJ4 4 Remove the five M2 5x6 screws securing the keyboard base plate to the bottom cover and lift off the plate Figure 4 9 Figure 4 9 Removing the Keyboard Base Plate 5 Remove the tape over the backup battery cable and lift out the backup batte...

Page 122: ...ove the M2 5x6 screw from the front of the HDD and slide the HDD to the front to disconnect the HDD connector Figure 4 11 7 Lift out the HDD from the system unit Figure 4 11 Removing the HDD 8 Disconnect the backup battery cable from PJ503 Figure 4 10 ...

Page 123: ...d disk drive and backup battery follow the steps below and refer to Figures 4 9 through 4 13 1 Secure the bracket with the four flat head M3x4 screws Figure 4 12 2 Connect the backup battery cable to PJ503 Figure 4 10 3 Place the HDD into the HDD slot and slide the HDD to the back Make sure the HDD connector connects to the lower system board connector PJ203 correctly as shown in Figure 4 13 Figur...

Page 124: ...the tape over the backup battery cable 6 Secure the M2 5x6 screw at the front of the HDD Figure 4 11 7 Set the keyboard base plate in place and secure it with the five M2 5x6 screws Figure 4 9 8 Replace the tape next to the keyboard connector PJ4 9 Install the keyboard top cover optional PCMCIA card optional memory card and battery pack as described in Sections 4 6 through 4 2 ...

Page 125: ...e two screw covers from the display hinges to expose two screws securingthedisplaymask 3 Remove the two M2 5x6 silver screws that were covered by the screw covers 4 Carefully insert your fingers between the mask and the LCD panel and pry open the latches Start with the four latches across the top of the display mask 5 Continue unlatching the mask along the sides four latches on each side at the bo...

Page 126: ...s beginning with the four snaps in the display supports three snaps in the larger support and one snap in the small support 2 Continue along the bottom of the display two snaps along the sides four snaps and across the top four snaps 3 Secure the cover with two M2 5x6 silver screws at the display hinges 4 Attach the two screw covers at each display hinge to cover the screws ...

Page 127: ...oard base plate and display mask as described in Sections 4 2through4 8 3 Set the display unit at a 90 angle to the base and remove the two hinge covers from the left and right hinges Figure 4 15 Figure 4 15 Removing the Hinge Covers 4 Remove the four M2 5x8 silver screws and two M2 5x10 screws on the system board cover Figure 4 16 Note that the M2 5x8 screw under the hinge secures the ground wire...

Page 128: ... disconnect the display sensor switch cable from PJ11 on the system board 8 Remove the M2 5x6 silver screw at the back right corner of the computer 9 Lay the display back fully put a book or small box behind the display to support it and remove the two M2 5x8 silver screws on the display hinges securing the display then lift off the display assembly Figure 4 17 Removing the Display Assembly ...

Page 129: ... Connect the display sensor switch cable to PJ11 on the system board Figure 4 17 4 Connect the two display cables to PJ7 and PJ8 on the system board Figure 4 17 5 Secure the M2 5x6 silver screw on the back of the computer Figure 4 17 6 Set the system board cover in place and secure the display ground wire with an M2 5x8 silver screw Figure 4 16 7 Secure the system board cover with three M2 5x8 sil...

Page 130: ...battery pack optional memory card optional PCMCIA card top cover keyboard HDD display mask and display assembly as described in Sec tions4 2through4 9 3 Disconnect the mouse KB cable from PJ3 and RTC battery cable from PJ2 on theuppersystemboard 4 Remove the M2 5x6 silver screw on the left side of the upper system board and M2x8 screw on the optional memory card connector 5 Pull up the upper syste...

Page 131: ...the lower system board CAUTION When you install the upper system board be careful not to cover the RTC battery cable and mouse KB cable These cables must be connected to the PJ2 and PJ3 connectors on the upper system board 2 Secure the M2 5x6 screw on the left side of the upper system board and the M2x8 screw on the optional memory card connector 3 Connect the RTC battery cable to PJ2 and mouse KB...

Page 132: ...oard HDD display mask display assembly and upper system board as described in Sections 4 2 through 4 10 3 Remove the tape and RTC battery from the middle frame assembly Figure 4 19 4 Disconnect the FDD cable from PJ202 on the lower system board Figure 4 19 Figure 4 19 Removing the RTC Battery and FDD Cable 5 Remove the M2 5x6 silver screw from the bottom of the computer Figure 4 20 6 Remove the tw...

Page 133: ... When you remove the lower system board assembly carefully slide the FDD cable out of the hole on the middle frame assembly Figure 4 20 Removing the Lower System Board Assembly 9 Turn the lower system board assembly over remove the two M2 5x6 screws then lift off the lower metal plate and PCMCIA ejector button Figure 4 21 Figure 4 21 Removing the Lower Metal Plate ...

Page 134: ...em board into the middle frame assembly from left to right making certain that the DC IN jack fits into the hole on the right side of the middle frame assembly 3 Place the PCMCIA card ejector on the PCMCIA frame assembly The card ejector fits inside the walls of the PCMCIA frame assembly and hooks into the holes on the PCMCIA connector 4 Secure the two M2x8 screws on the PCMCIA connector and two M...

Page 135: ...e power supply circuits and connect the FDD cable to PJ202 Figures 4 19 and 4 20 9 Secure the M2 5x6 screw on the bottom of the unit Figure 4 20 10 Set the RTC battery in the RTC battery holder on the middle frame assembly and place the tape over the battery Figure 4 19 11 Set the PCMCIA expansion slot cover in place and secure it with two M2 5x6 screws 12 Install the upper system board display as...

Page 136: ...pack optional memory card optional PCMCIA card top cover keyboard HDD display mask display assembly upper system board and lower system board as described in Sections 4 2 through 4 11 3 Remove the two M2 5x6 screws on the mouse KB board assembly Figure 4 23 4 Lift the left side of the FDD unit with mouse KB board assembly and slowly pull it to the left to remove the assembly from the chassis Figur...

Page 137: ...lace the FDD bracket on the FDD and secure it with the three M2x3 black screws Figure 4 25 2 Secure the mouse KB board with two M2 5x4 screws to the FDD bracket Figure 4 24 3 Place the FDD assembly in the computer right side first and secure the mouse KB board with two M2 5x6 screws Figure 4 23 4 Install the lower system board upper system board display assembly display mask HDD status indicator p...

Page 138: ...mputer 2 Remove the battery pack optional memory card optional PCMCIA card top cover and display mask as described in Sections 4 2 4 3 4 4 4 5 and 4 8 3 Remove the four M2 5x6 screws securing the display support plate Figure 4 26 Figure 4 26 Removing the Display Support Plate 4 Remove the two M2 5x6 screws securing the FL inverter board Figure 4 27 5 Carefully rotate the FL inverter board out from...

Page 139: ...CN3 Figure 4 27 2 Route the cables so they are not pinched by the FL inverter board display hinge orothercomponent 3 Replace the FL inverter board and secure it with the two M2 5x6 screws Figure 4 27 4 Set the display support plate in place and secure it with four M2 5x6 screws One screw also secures the display ground cable Figure 4 26 5 Install the display mask top cover optional PCMCIA card opt...

Page 140: ...cables connected to the computer 2 Remove the battery pack optional memory card optional PCMCIA card top cover display mask display assembly and inverter board as described in Sections 4 2 4 3 4 4 4 5 4 8 4 9 and 4 13 3 Remove the M2 5x6 screw securing the LCD module to the LCD cover 4 Carefully rotate the LCD module from right to left out of the display cover and disconnect the three display cabl...

Page 141: ... the three display cables to the LCD module and carefully rotate the LCD module into the LCD cover 2 Secure the M2 5x6 screw on the LCD module 3 Install the FL inverter board display assembly display mask top cover optional PCMCIA card optional memory card and battery pack as described in Sections 4 13 4 9 4 8 4 5 4 4 4 3 and 4 2 ...

Page 142: ...disconnect the AC adapter power cord and all external cables connected to the computer 2 Remove the battery pack optional memory card optional PCMCIA card top cover display mask display assembly FL inverter board and LCD module as described in Sections 4 2 4 3 4 4 4 5 4 8 4 9 4 13 and 4 14 3 Lay the color LCD module face down and use needle nose pliers to unbend the 16 latches holding the front an...

Page 143: ...x4 silver screws securing the FL unit and LCD panel to the back frame Figure 4 30 Figure 4 30 Removing the FL Screws 5 Pull out the reflective sheet from the LCD module 6 Lift out the FL Figure 4 31 Figure 4 31 Removing the FL ...

Page 144: ...he FL using the reflective sheet Figure 4 31 2 Secure the LCD panel with four M2x4 screws Figure 4 30 3 Carefully bend the 16 latches back into place Figure 4 29 4 Install the color LCD module FL inverter board display assembly display mask top cover optional PCMCIA card optional memory card and battery pack as described in Sections 4 14 4 13 4 9 4 8 4 5 4 4 4 3 and 4 2 ...

Page 145: ... pack optional memory card optional PCMCIA card top cover display mask and display assembly as described in Sections 4 2 through 4 5 4 8 and 4 9 3 Remove the five M2 5x6 screws securing the display support plate Figure 4 32 Figure 4 32 Removing the Display Support Plate 4 Remove the M2 5x6 screw securing the FL inverter board Figure 4 33 5 Turn the FL inverter board over and disconnect the FL cabl...

Page 146: ... cables so they will not be pinched by the display cover or other component 3 Secure the FL inverter board with one M2 5x6 screw Figure 4 33 4 Set the display support plate in place and secure it with five M2 5x6 screws One screw also secures the display ground cable Figure 4 32 5 Install the display assembly display mask top cover optional PCMCIA card optional memory card and battery pack as desc...

Page 147: ...e power to the T1900 T1900C and if attached disconnect the AC adapter power cord and all external cables connected to the computer 2 Remove the battery pack optional memory card optional PCMCIA card top cover display mask display assembly and FL inverter board as described in Sections 4 2 4 3 4 4 4 5 4 8 4 9 and 4 16 3 Remove the two M2 5x6 screws 4 Rotate the LCD module out of the cover from righ...

Page 148: ...to CN1 and CN2 on the LCD module 2 Place the module in the cover and route the cables so they will not be pinched by the display panel or other components 3 Secure the panel with two M2 5x6 screws 4 Install the FL inverter board display assembly display mask top cover optional PCMCIA card optional memory card and battery pack as described in Sections 4 16 4 9 4 8 4 5 4 4 4 3 and 4 2 ...

Page 149: ...power cord and all external cables connected to the computer 2 Remove the battery pack optional memory card optional PCMCIA card top cover display mask FL inverter and LCD module as described in Sections 4 2 4 3 4 4 4 5 4 8 4 9 4 16 and 4 17 3 Peel off the tape from the lamp cover then remove three M1 5x3 brass flat head screws securing the cover and take off the cover 4 Remove the fluorescent lam...

Page 150: ...me and align the holes in the cover with the corresponding holes in the display assembly cover 3 Secure the plastic cover with the three flat head M1 5x3 brass screws 4 Secure the FL cable to the LCD panel with tape as indicated in Figure 4 35 5 Install the LCD panel FL inverter display assembly display mask top cover optional PCMCIA card optional memory card and battery pack as described in Secti...

Page 151: ...n installing the LCD module in the LCD cover be sure to seat it so that it is properly aligned and maximum visibility of the display is maintained 2 Be careful to align the holes at the four corners of the LCD module with the corresponding holes in the LCD cover before securing the module with screws Do not force the module into place because stress can affect its performance Also the panel s pola...

Page 152: ...nd a CRT cleaning agent Apply the agent to a cloth and then wipe the panel s surface Do not apply cleanser di rectly to the panel 4 If water or other liquid is left on the panel s surface for a long period it can change the screen s tint or stain it Be sure to quickly wipe off any liquid 5 Glass is used in the panel so be careful not to drop it or let it strike a hard object which could cause brea...

Page 153: ...ure to wear a wrist or ankle ground when handling themodule 7 Do not expose the module to direct sunlight or strong ultraviolet rays for long periods 8 Do not store the module at temperatures below specifications Cold can cause the liquid crystals to freeze lose their elasticity or otherwise suffer damage ...

Page 154: ...odule Disassembly can cause malfunctions 10 If you transport the module do not use packing material that contains epoxy resin amine or silicon glue alcohol or oxime These materials can release gas that can damage the panels polarization ...

Page 155: ...B 1 Appendix B Board Layout B 1 FATSU Upper System Board Figure B 1 FATSU Upper System Board front ...

Page 156: ...B 2 Figure B 2 FATSU Upper System Board back G ...

Page 157: ... Optional Memory Card Connector F PJ2 RTC Battery Connector G PJ3 Mouse KB Connector H PJ4 Keyboard Connector I PJ7 8 LCD Connector Table B 2 FATSU Upper System Board ICs and Connectors back Mark Number Name A IC1 CPU 80486SX B IC4 to 7 IC8 to 11 System Memory IC54 to 61 C IC14 Real Time Clock D IC20 21 Video Memory E PJ5 Power Supply Interface Connector F PJ10 Joint Connector G PJ9 CRT Connector ...

Page 158: ...B 4 B 2 FATSL Lower System Board Figure B 3 FATSL Lower System Board front ...

Page 159: ...B 5 Figure B 4 FATSL Lower System Board back ...

Page 160: ...ctor E PJ202 Internal FDD Connector F PJ204 Serial Interface Connector G PJ501 Power Supply Connector H PJ206 Joint Connector I PJ502 DC IN Connector J PJ503 Backup Battery Connector K PJ504 Main Battery Connector Table B 4 FATSL Lower System Board ICs and Connectors back Mark Number Name A IC203 PCMCIA Controller Gate Array B PJ203 Internal HDD Connector C PJ205 PCMCIA Connector ...

Page 161: ...11 O 60 MA07 111 O 17 VCC 61 MA09 111 O 18 MA06 111 O 62 GND 19 MA08 111 O 63 GND 20 MA10 111 O 64 GND 21 GND 65 RAS1 001 O 22 RAS0 001 O 66 CAS2 011 O 23 CAS0 011 O 67 GND 24 CAS1 011 O 68 CAS3 011 O 25 VCC 69 RAS3 001 O 26 GND 70 MEMWE 011 O 27 B3V 71 DRAMST1 100 I O 28 DRMST2 100 I O 72 DRAMST3 100 I O 29 DRMST4 100 I O 73 GND 30 DRMST6 100 I O 74 DRAMST5 100 I O 31 CAS0 011 O 75 DRAMST7 100 I ...

Page 162: ...CLK 100 I O 03 VCC 08 GND 04 MOUSED 100 I O 09 GND 05 MUSECK 100 I O 10 GND C 4 PJ4 KB I F Connector 19 Pin Table C 4 KB I F Connector Pin Assignments 19 pin Pin Signal I O Pin Signal I O 01 KBOT00 000 O 11 KBOT03 000 O 02 KBRT6 100 I 12 KBOT04 000 O 03 KBRT0 100 I 13 KBOT05 000 O 04 KBRT2 100 I 14 KBOT06 000 O 05 KBRT3 100 I 15 KBOT08 000 O 06 KBRT1 100 I 16 KBOT02 000 O 07 KBRT7 100 I 17 KBOT07 ...

Page 163: ... I O 11 PCLR 000 I O 31 KEYPRS 100 O I 12 PNLOFF 000 O I 32 POPUP 100 O I 13 GND 33 KBCS 000 I O 14 GND 34 SPEAK 100 I O 15 VCC 35 IHMED 000 I O 16 VCC 36 SUBBAT 100 I O 17 VCC 37 N C 18 VCC 38 N C 19 VCC 39 GND 20 VCC 40 GND C 6 PJ7 LCD Connector 1 20 Pin Table C 6 LCD Connector 1 Pin Assignments 20 pin Pin Signal I O Pin Signal I O 01 LPF 110 O 11 SUD0 110 O 02 LCLK 110 O 12 SLD3 110 O 03 FPF 11...

Page 164: ...110 O 07 SCLD13 110 O 03 SCLD15 110 O 08 SCLD14 110 O 04 SCLD08 110 O 09 GND 05 SCLD12 110 O 10 GND C 8 PJ9 CRT I F Connector 15 Pin Table C 8 CRT I F Connector Pin Assignments 15 pin Pin Signal I O Pin Signal I O 01 RED 101 O 09 N C 02 LGREN 101 O 10 GND 03 BLUE 101 O 11 N C 04 N C 12 N C 05 GND 13 PHSYNC 100 O 06 GND 14 PVSYNC 100 O 07 GND 15 N C 08 GND ...

Page 165: ...1 SD12 100 I O 22 IORD 000 I O 72 SD13 100 I O 23 DMACLK 100 O I 73 SD14 100 I O 24 DMARDY 100 O I 74 SD15 100 I O 25 SMER 000 O I 75 LA20 100 I O 26 SMEW 000 O I 76 LA21 100 I O 27 DMAWR 000 I O 77 LA22 100 I O 28 DMARD 000 I O 78 LA23 100 I O 29 AEN 100 I O 79 MEWR 000 I O 30 DACK2 000 I O 80 MERD 000 I O 31 DMAEN8 100 I O 81 BALE 100 O I 32 ENPNBP 000 I O 82 SBHE 000 I O 33 IRQ8 100 O I 83 BPRF...

Page 166: ... PRT FDD Connector for Printer 25 Pin Table C 11 PRT FDD Connector for printer Pin Assignments 25 pin Pin Signal I O Pin Signal I O 01 STROB O 14 AUTFD O 02 PDB00 I O 15 ERROR I 03 PDB01 I O 16 PINT O 04 PDB02 I O 17 SLIN O 05 PDB03 I O 18 GND 06 PDB04 I O 19 GND 07 PDB05 I O 20 GND 08 PDB06 I O 21 GND 09 PDB07 I O 22 GND 10 ACK I 23 GND 11 BUSY I 24 GND 12 PE I 25 GND 13 SELCT O ...

Page 167: ...C 22 GND 10 DSL O 23 GND 11 MON O 24 GND 12 WDAT O 25 GND 13 WEN O C 13 PJ202 Internal FDD Connector 26 Pin Table C 13 Internal FDD Connector Pin Assignments 26 pin Pin Signal I O Pin Signal I O 01 VCC 14 ISTEP 000 O 02 IINDEX 000 I 15 GND 03 VCC 16 IWDAT 000 O 04 IDSL 000 O 17 GND 05 VCC 18 IWEN 000 O 06 DSKCHG 000 I 19 GND 07 VCC 20 ITR0 000 I 08 IRDY 000 I 21 GND 09 IHMED 000 I 22 IWPR 000 I 10...

Page 168: ... 10 SD11 100 I O 32 IIO16 000 I 11 SD03 100 I O 33 SA01 100 I O 12 SD12 100 I O 34 N C 13 SD02 100 I O 35 SA00 100 I O 14 SD13 100 I O 36 SA02 100 I O 15 SD01 100 I O 37 HDC0CS 000 O 16 SD14 100 I O 38 HDC1CS 000 O 17 SD00 100 I O 39 DRVSL 000 I 18 SD15 100 I O 40 GND 19 GND 41 VCC 20 N C 42 VCC 21 N C 43 GND 22 GND 44 RVCC C 15 PJ204 Serial I F Connector 9 Pin Table C 15 Serial I F Connector Pin ...

Page 169: ... 100 O 46 CADA17 100 O 13 CADA13 100 O 47 CADA18 100 O 14 CADA14 100 O 48 CADA19 100 O 15 WEA 000 O 49 CADA20 100 O 16 BSYA 000 I 50 CADA21 100 O 17 MCVCCA 51 MCVCCA 18 MCVP1A 52 MCVP2A 19 CADA16 100 O 53 CADA22 100 O 20 CADA15 100 O 54 CADA23 100 O 21 CADA12 100 O 55 CADA24 100 O 22 CADA07 100 O 56 CADA25 100 O 23 CADA06 100 O 57 N C 24 CADA05 100 O 58 CRSTA 100 O 25 CADA04 100 O 59 WAITA 000 I 2...

Page 170: ...1 DCIN 03 GND 02 GND C 18 PJ503 Backup Battery Connector 2 Pin Table C 18 Backup Battery Connector Pin Assignments 2 pin Pin Signal I O Pin Signal I O 01 SUBBAT 02 GND C 19 PJ504 Main Battery Connector 5 Pin Table C 19 Main Battery Pin Assignments 5 pin Pin Signal I O Pin Signal I O 01 BATT 04 GND 02 CBTH 05 GND 03 N C ...

Page 171: ...D 1 Appendix D USA Display Codes Table D 1 USA Display Codes ...

Page 172: ...C 8C 4E F0 4E 13 0D 8D 55 F0 55 15 BkSp 0E 8E 66 F0 66 16 Tab 0F 8F 0D F0 0D 17 Q 10 90 15 F0 15 18 W 11 91 1D F0 1D 19 E 12 92 24 F0 24 20 R 13 93 2D F0 2D 21 T 14 94 2C F0 2C 22 Y 15 95 35 F0 35 23 U 16 96 3C F0 3C 2 24 I 17 97 43 F0 43 2 25 O 13 98 44 F0 44 2 26 P 19 99 4D F0 4D 2 27 1A 9A 54 F0 54 28 1B 9B 5B F0 5B 29 42 2B AB 5D F0 5D 5 30 Caps Lock 3A BA 58 F0 58 31 A 1E 9E 1C F0 1C 32 S 1F ...

Page 173: ...1 F0 41 2 54 34 B4 49 F0 49 2 55 35 B5 4A F0 4A 2 57 Shift R 36 B6 59 F0 59 58 Ctrl 1D 9D 14 F0 14 3 60 Alt L 38 B8 11 F0 11 3 61 Space 39 B9 29 F0 29 62 ALT R E0 38 E0 B8 E0 11 E0 F0 11 75 Ins E0 52 E0 D2 E0 70 E0 F0 70 1 76 Del E0 53 E0 D3 E0 71 E0 F0 71 1 79 E0 4B E0 CB E0 6B E0 F0 6B 1 80 Home E0 47 E0 C7 E0 6C E0 F0 6C 1 81 End E0 4F E0 CF E0 69 E0 F0 69 1 83 E0 48 E0 C8 E0 75 E0 F0 75 1 84 E...

Page 174: ...C2 0A F0 0A 120 F9 43 C3 01 F0 01 121 F10 44 C4 09 F0 09 122 F11 57 D7 78 F0 78 3 123 F12 58 D8 07 F0 07 3 124 PrintSc 6 6 6 6 6 126 Pause 7 7 7 7 7 202 Fn 4 Notes 1 Scan codes differ by mode 2 Scan codes differ by overlay function 3 In combination with Fn key makes different codes 4 Fn key does not generate a code by itself 5 This key corresponds to Key No 42 in 102 key model 6 Refer to Table E 6...

Page 175: ...above shows scan codes with the Left Shift key In combination with the Right Shift key scan codes are changed as listed below With Left Shift With Right Shift Set 1 E0 AA E0 B6 E0 2A E0 36 Set 2 E0 F0 12 E0 F0 59 E0 12 E0 59 Table E 3 Scan Codes in Numlock Mode Cap Key Code Set 1 Code Set 2 No top Make Break Make Break 75 INS E0 2A E0 52 E0 02 E0 AA E0 12 E0 70 E0 F0 70 E0 F0 12 76 DEL E0 2A E0 53...

Page 176: ...09 8 8 48 C8 75 F0 75 10 9 9 49 C9 7D F0 7D 11 0 37 B7 7C F0 7C 23 U 4 4B CB 6B F0 6B 24 I 5 4C CC 73 F0 73 25 O 6 4D CD 74 F0 74 26 P 4A CA 7B F0 7B 37 J 1 4F CF 69 F0 69 38 K 2 50 D0 72 F0 72 39 L 3 51 D1 7A F0 7A 40 4E CE 79 F0 79 52 M 0 52 D2 70 F0 70 53 33 B3 41 F0 41 54 53 D3 71 F0 71 55 E0 35 E0 B5 40 4A E0 F0 4A Table E 6 Scan Codes with Ctrl Key Key Code Set 1 Code Set 2 top Shift Make Br...

Page 177: ...6 Table E 7 Scan Codes with Alt Key Key Code Set 1 Code Set 2 top Shift Make Make Pause Common E1 ID 45 E1 SD C5 E1 14 77 E1 F0 14 F0 77 Ctrl E0 46 E0 C6 E0 7E E0 F0 7E This key generates only Make codes ...

Page 178: ...F 1 Appendix F Keyboard Layouts F 1 United States US Keyboard Figure F 1 US Keyboard F 2 United Kingdom UK Keyboard Figure F 2 UK Keyboard ...

Page 179: ...F 2 F 3 German GR Keyboard Figure F 3 GR Keyboard F 4 French FR Keyboard Figure F 4 FR Keyboard ...

Page 180: ...F 3 F 5 Spanish SP Keyboard Figure F 5 SP Keyboard F 6 Italian IT Keyboard Figure F 6 IT Keyboard ...

Page 181: ...F 4 F 7 Scandinavian SC Keyboard Figure F 7 SC Keyboard F 8 Swiss German SL Keyboard Figure F 8 SL Keyboard ...

Page 182: ...F 5 F 9 Canadian Specialized Keyboard Figure F 9 Canadian Keyboard F 10 Keycap Number Keyboard Figure F 10 Keycap Number Keyboard ...

Page 183: ...IN 2 PD0 11 BUSY Figure G 1 Printer Wraparound Connector G 2 RS 232 C Wraparound Connector 3 TD 2 RD 7 RTS 8 CTS 1 CD 4 DTR 6 DSR 9 RI Figure G 2 RS 232 C Wraparound Connector G 3 RS 232 C Direct Cable 9 Pin to 9 Pin 3 TD 2 RD 4 DTR 6 DSR 8 CTS 9 RI 7 RTS 1 CD 5 GND 5 GND 2 RD 3 TD 1 CD 7 RTS 6 DSR 4 DTR 8 CTS 9 RI Figure G 3 RS 232 C Direct Cable 9 pin to 9 pin G 1 ...

Page 184: ...G 2 G 4 RS 232 C Direct Cable 9 Pin to 25 Pin 1 CD 4 RTS 2 RD 2 TD 3 TD 3 RD 4 DTR 5 CTS 6 DSR 22 RI 5 GND 7 GND 7 RTS 8 CD 6 DSR 20 DTR 8 CTS 9 RI Figure G 4 RS 232 C Direct Cable 9 pin to 25 pin ...

Search results

Summary of Contents for T1950

Reviews:

Related manuals for T1950

Brands by name

Popular brands

Toshiba T1950, User Manual

Search results

Summary of Contents for T1950

Reviews:

Related manuals for T1950

Brands by name

Popular brands